ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Zichao Lian,Pengpeng Xu,Wenchao Wang,Dieqing Zhang,Shuning Xiao,Xin Li,Guisheng Li
Fullerene (C60) enhanced mesoporous CdS/TiO2 architectures were fabricated by an evaporation induced self-assembly route together with an ion-exchanged method. C60 clusters were incorporated into the pore wall of mesoporous CdS/TiO2 with the formation of C60 enhanced CdS/TiO2 hybrid architectures, for achieving the enhanced photostability and photocatalytic activity in H2 evolution under visible-light irradiation. Such greatly enhanced photocatalytic performance and photostability could be due to the strong combination and heterojunctions between C60 and CdS/TiO2. The as-formed C60 cluster protection layers in the CdS/TiO2 framework not only improve the light absorption capability, but also greatly accelerated the photogenerated electron transfer to C60 clusters for H2 evolution.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 6
·415
·
IF 3.504
Wei Li,Hao Ding,Hua Ji,Wenbin Dai,Jianping Guo,Gaoxiang Du
A photocatalytic active CdS-TiO2heterostructure composite was prepared by hydrothermal method and its morphology and properties were characterized. Results indicate that the CdS nanoparticles deposited on the surface of a TiO2nanoparticles, which was in anatase phase. The particle scale of both of the components reached approximately 15 nm. In comparison to pure TiO2(410 nm), the light absorption edge of the heterostructure composite was 550 nm, which could extend the light response from UV to the visible region. Under visible light irradiation, the degradation efficiency of tetracycline hydrochloride by the CdS-TiO2composite achieved 87.06%, significantly enhancing photocatalytic activity than the as-prepared pure TiO2and commercial TiO2(Degussa P25). This character is attributed to the synergetic effect of these two components in the absorption of visible light.Keywords:CdS-TiO2heterostructure composite;photocatalyst;tetracycline hydrochloride
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Xin Li,Xiang Chen,Hao Niu,Xiao Han,Ting Zhang,Jiuyu Liu,Huiming Lin,Fengyu Qu
In this paper, CdS/TiO 2 heteronanofibers have been prepared for the photocatalysis toward organic dyes under visible irradiation. Firstly, the one dimensional (1D) TiO 2 porous nanofibers (50–100) nm in diameter and several micrometers in length were synthesized by electrospinning and then CdS nanopaticles (50–100 nm in size) successfully grown onto TiO 2 fibers to form the heterostructure . These CdS/TiO 2 heteronanofibers were adopted as photocatalyst and the photocatalsis processes were analyzed in detail, showing the enhanced visible photodecomposition and good recycle ability. Furthermore, the degradation kinetics was further investigated by varying the amount of CdS. The increase of CdS component may enhance the degradation rate under visible light , but the total degradation efficiency also is affected by the adsorption capacity of catalyst toward the dyes. With the improved visible light degradation performance, these CdS/TiO 2 heteronanofibers would be expected to be used in water purification .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jianglin Tu,Jinwang Li,Zhefei Pan,Xun Zhu,Dingding Ye,Yang Yang,Hong Wang,Liang An,Rong Chen,Qiang Liao
Photoelectrochemical water splitting represents a promising route for converting solar energy into hydrogen, but sluggish reaction kinetics associated with inefficient charge separation and migration, and poor stability limit solar-to-hydrogen conversion. In this work, we develop a N-doped-CdS/TiO 2 -nanorods heterojunction photoanode for photoelectrochemical water splitting by anchoring CdS on TiO 2 nanorods followed by nitrogen doping. The light harvesting is significantly enhanced and the charge separation and migration are promoted due to the formed heterojunction and nitrogen doping, which greatly enhances the water oxidation reaction. As a result, the photoelectrochemical cell with the optimized N-doped-CdS/TiO 2 -nanorods heterojunction photoanode yields a hydrogen production rate of 42.6 μmol cm −2 h −1 , which is 2.51 times higher than that of the TiO 2 -nanorods photoanode. In particular, doping nitrogen atoms into CdS greatly alleviates the photocorrosion problem. Therefore, the newly-developed photoanode exhibits excellent stability under a continuous 10-h running.
研究领域:
材料科学
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Shiva Pandeya,Rui Ding,Yufei Ma,Xuling Han,Meixing Gui,Purnima Mulmi,Khim Prasad Panthi,Bhanu Bhakta Neupane,Hem Raj Pant,Ziliang Li,Mahesh Kumar Joshi
The self-standing TiO 2 nanofiber-based heterojunction with excellent visible-light-driven photocatalytic activity, antimicrobial activity, and reusability holds great importance in water and airborne pollutant management. Herein, a series of splendid flexible CdS/TiO 2 (CdS/TZ) nanofibrous membranes (NFMs) were fabricated by facile post-electrospinning treatment. The self-standing TiO 2 NFM was first prepared via the electrospinning technique followed by controlled calcination, and then the CdS nanoparticles (NPs) were grown by the successive ionic layer adsorption and reaction (SILAR) method. The careful deposition of CdS NPs preserved the self-standing properties of the TiO 2 membrane. The amount of CdS NPs in the CdS/TiO 2 membrane was tailored by varying the SILAR cycles. The CdS/TiO 2 heterojunction demonstrated superior antimicrobial efficacy against both Gram-positive and Gram-negative bacteria. Additionally, it enhanced the photocatalytic degradation of the methyl orange and effectively removed oxidizable impurities from pharmaceutical effluent while maintaining good recycling capacity. The photocatalytic degradation of methyl orange obeyed the pseudo-first-order reaction dynamics model and showed a strong influence of the CdS amount on the degradation. The maximum degradation rate for methyl orange dye using the CdS/TiO 2 Janus membrane was 0.057 min −1 , which was 3.5 times that of the TiO 2 membrane. The degradation efficiency of CdS/ TiO 2 was found to be up to 96.8% in 60 minutes and showed excellent photocatalytic activity in five consecutive cycles. The chemical oxygen demand (COD) removal efficiency for the TiO 2 membrane was 74.16, which was increased to 91.66% for the CdS/TiO 2 membrane. This study provides insight into developing highly efficient Janus inorganic nanofiber with superior structural integrity for waste water treatment and environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Wei Yuan,Zhen Zhang,Xiaoling Cui,Huarong Liu,Chen Tai,Yuanrui Song
Hollow mesoporous CdS@TiO2@Au microspheres as a photocatalyst have been successfully synthesized by γ-irradiation deposition of Au nanoparticles (NPs) on the double shell of hollow CdS@TiO2 microspheres, which are prepared via the “hard core template” approach combining with calcination and solvothermal reaction. The morphology, structure, and properties of the as-prepared hybrid photocatalyst have been characterized by TEM, XRD, XPS, N2 adsorption–desorption, UV–vis DRS, PL, and photoelectrochemical measurements. The results show that the hollow mesoporous double-shell structure is formed with a fluffy TiO2 coating on the surface of the CdS shell composed of stacked CdS NPs. This ternary hybrid photocatalyst exhibits excellent photocatalytic activity for hydrogen evolution and stability under visible-light illumination, which is attributed to the unique ternary hollow mesoporous double-shell heterostructure that may extend the light responsive region, enhance the light-harvesting efficiency, prevent the direct contact between the CdS shell and O2 and H2O, facilitate mass transfer, reduce the recombination rate of charge carriers, and promote the efficiency of water splitting H2 evolution ultimately. The photocatalytic hydrogen generation rate (1720 μmol·g–1·h–1) of the hollow CdS@TiO2@Au microspheres is 2.37 and 12.7 times higher than those of hollow CdS@TiO2 and CdS microspheres, respectively. The loading amount of Au NPs also influences the photocatalytic hydrogen evolution activity of the ternary photocatalyst. Our work expands the application of hybrid hollow microsphere photocatalysts in photocatalytic hydrogen generation by the rational design for enhancing photocatalytic activity under visible light.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Keliang Wu,Pengcheng Wu,Junfang Zhu,Chang Liu,Xuejun Dong,Jianning Wu,Guihua Meng,Kangbo Xu,Juan Hou,Zhiyong Liu,Xuhong Guo
During the photocatalytic production of hydrogen gas, close interface with a catalyst is very important. We designed a noble-metal-free photocatalytic system that is spatially separated to produce hydrogen by high frequency visible light. We used a new type of a catalyst consisting of hollow core-shell CdS@TiO 2 /Ni 2 P structures prepared using sacrificial template method. Photocatalytic decomposition of water was tested using this catalyst. Hydrogen production yield using 420 nm light was 14.80 mmol/g after 2.5 h and using Xe lamp with AM1.5G filter was 34.78 mmol/g after 2.5 h. Hollow core shell CdS@TiO 2 /Ni 2 P particles were more stable than hollow core shell CdS@TiO 2 /Pt structures because TiO 2 protected CdS from photo-corrosion. Combination of CdS and Ni 2 P increased absorption range of TiO 2 at 720 nm. Holes and electrons produced during the photo-reaction can migrate to the CdS on the inside and to the Ni 2 P on the outside of the TiO 2 protective coating. Such design exposes more surface, thus, increases hydrogen production.
研究领域:
材料科学
·
光催化
·
能源转换
·
环境科学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 7
·1-10
·
IF 5.7
Zhang Yujie,Yu Jiarui,Huang Wanjin,Jin Zhenhuan,Li Jianping
A novel extended-gate field-effect transistor (FET) photoelectrochemical (EGFET PEC) sensor was designed for highly sensitive detection of L-cysteine (L-Cys). TiO 2 was initially modified on the ITO electrode by the sol–gel dip-coating method and calcined to produce TiO 2 /ITO. Then, CdS was synthesized on the TiO 2 surface by hydrothermal method to obtain the CdS–TiO 2 heterojunction material. CdS/TiO 2 /ITO was connected to the gate of the FET to obtain an EGFET PEC sensor. Under the irradiation of a xenon lamp simulating visible light, the CdS/TiO 2 heterojunction composite absorbs light energy to produce photogenerated electron–hole pairs, which have strong photocatalytic oxidation activity and oxidize L-Cys covalently identified by Cd(II) through CdS covalent. These pairs generate a photovoltage that controls the current between the source and the drain to detect L-Cys. Under the optimized experimental conditions, the optical drain current ( I D ) of the sensor exhibited a good linear relationship with the logarithm of L-Cys in the range of 5.0 × 10 −9 –1.0 × 10 −6 mol/L, and the detection limit was 1.3 × 10 −9 mol/L (S/N = 3), which is lower than the values reported by other detection methods. Results showed that the CdS/TiO 2 /ITO EGFET PEC sensor revealed high sensitivity and good selectivity. The sensor has been used to determine L-Cys in urine samples. Graphical abstract
研究领域:
分析化学
·
生物传感器
·
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 128
·期 1
·1-14
·
IF 2.584
Chen Peng,Wu Keliang,Peng Xiang,Ma Yue,Yang Xuqi,Duan Xinping,Ma Yan,Liu Zhiyong
Hydrogen and oxygen production based on photocatalytic monolithic water splitting is considered to be one of the effective ways to produce sustainable and clean energy. The key challenge in this process is to develop new photocatalysts that can simultaneously produce H 2 and O 2 at a stoichiometric ratio of 2:1 without the use of any sacrificial agents. In order to solve this problem, highly efficient and ingenious photosystems in nature have been studied intensively. Herein, we prepared printable Z-type composite photocatalysts CdS@TiO 2 /Pt/ITO/WO 3 /Co 3 O 4 mimicking biological vegetative leaves in nature and constructed an “artificial leaf” device that completely decomposes water. We use an electron solid penetrating transporter ITO, which can rapidly transfer photogenerated electrons and photogenerated holes and reduce the compound rate of photogenerated carriers. Thus, the efficiency of photocatalytic total water dissolution is enhanced. This photocatalyst was able to produce both H 2 and O 2 in water with an H 2 production rate of 75.93 μmol g −1 h −1 and an O 2 production rate of 36.49 μmol g −1 h −1 . We designed the oxygen-producing photocatalyst WO 3 /Co 3 O 4 , which produced oxygen at a rate of 159.21 μmol g −1 h −1 6 times higher than that of WO 3 alone. Furthermore, the morphology, composition, and microstructures of the photocatalyst were characterized by field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and nitrogen adsorption–desorption.
研究领域:
材料科学
·
化学工程
·
环境科学
·
纳米技术
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Zhifeng Jiang,Kun Qian,Chengzhang Zhu,Hongli Sun,Weiming Wan,Jimin Xie,Huaming Li,Po Keung Wong,Shouqi Yuan
Photocatalytic H 2 evolution from water splitting requires an efficient photocatalyst with excellent charge separation ability and broad visible-light adsorption region. 0D CdS-TiO 2 nanodots (NDs) were successfully decorated on the 2D g-C 3 N 4 sheets via an epitaxial growth process. The as-synthesized ternary composite of CdS-TiO 2 @g-C 3 N 4 exhibits enhanced visible-light-driven photocatalytic H 2 evolution activity, as compared to the binary composites and their single components, which is about 6.7 and 11.2 times higher than those of single CdS and g-C 3 N 4 , respectively. Moreover, the as-obtained ternary composite has an external quantum efficiency (EQE) of 11.9% at 420 nm, implying the high utilization efficiency of photo-induced charges. In addition, the superior photostability can be achieved by this coupling method. The enhanced photocatalytic activity was attributed to the efficient charge separation originated from the three-level electron transfer system, the matched energy level positions, the abundant adsorption sites and active sites (0D/2D structure) and the synergistic effect among CdS, TiO 2 and g-C 3 N 4 . The work present here demonstrated that the construction of this three-level electron transfer system is an effective strategy to design more efficient ternary materials toward solar energy conversion (like H 2 production and CO 2 reduction).
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Applied Surface Science Advances
·
2023
·
IF 6.2
Zhufeng Shao,Yonglong Zhang,Jianyong Cheng,Libin Shi,Xiujuan Yang,Xiaoming Xiu
Firstly, oxygen vacancy defects are intentionally introduced in the preparation process of TiO 2 nanotube arrays (TiO 2 -NTAs) and porous silicon arrays (PSA) films through the anodic oxidation method after annealing treatment, as expected. Then, CdS/TiO 2 -NTAs and CdS/PSA heterostructures are successfully fabricated using the electrodeposition method, incorporating abundant surface vacancy defects. The crafted CdS/TiO 2 -NTAs nanoheterojunctions presented elevated photoelectrochemical (PEC) performances and sensing activities compared with that of CdS/PSA, validating by photodegradation and PEC biosensing tests, which mainly ascribed to the synergistic effect between the promoted carriers separation efficiency and boosted surface active sites induced by vacancies defects. Furthermore, a comparative and comprehensive interfacial charge transfer mechanism and qualitative dynamic processes for CdS/TiO 2 -NTAs and CdS/PSA type-II nanoheterojunctions are proposed, revealing an enlarged staggered band offset between CdS and TiO 2 -NTAs. The evaluation of this band offset was conducted using nanosecond time-resolved transient photoluminescence and steady photoluminescence spectra, respectively. Following this scheme, the photodegradation rate for CdS/TiO 2 -NTAs nanocomplex toward degradation of MO was 92.8% and 1.06 times than that of CdS/PSA; while the PEC biosensing performance for CdS/TiO 2 -NTAs showed a detection range 0 – 600 μM and limit of detection of 2.3 μM, with a sensitivity of 456 mA cm −2 M −1 .
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 14
·19380-19389
·
IF 2.478
Zhao Yingying,Zhang Jiejing,Fu Wuyou
Organic pollutant is an environmentally harmful and ubiquitous aquatic pollutant with extensive production and application. In this study, a unique novel TiO 2 -based dual-sensitized heterojunction photocatalyst (PbS/CdS/TiO 2 ) was successfully obtained by one step hydrothermal method, chemical bath deposition (CBD) method and ionic layer adsorption and reaction (SILAR) method. Scanning electron microscopy, X-ray photoelectron spectroscopy, transmission electron microscopy and energy dispersive spectrometer characterized the composition. PbS/CdS was successfully decorated on the surface of TiO 2 nanosheet array. As a stable catalyst with wide-spectrum (300–800 nm) optical response, excited electron–hole pairs of PbS/CdS/TiO 2 could apply in degrading organic pollutants. Successfully, the degradation efficiency of PbS(5 C)/CdS(30 min)/TiO 2 nanocomposites reached 99.9% under visible light, which was 5 times over pure TiO 2 . This ternary heterostructured materials will be well-promising photocatalysts.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）